31242523 has 12 divisors (see below), whose sum is σ = 34023360. Its totient is φ = 28675296.

The previous prime is 31242509. The next prime is 31242539. The reversal of 31242523 is 32524213.

It is not a de Polignac number, because 31242523 - 2²¹ = 29145371 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31242494 and 31242503.

It is not an unprimeable number, because it can be changed into a prime (31242503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37273 + ... + 38101.

It is an arithmetic number, because the mean of its divisors is an integer number (2835280).

Almost surely, 2^31242523 is an apocalyptic number.

31242523 is a deficient number, since it is larger than the sum of its proper divisors (2780837).

31242523 is a wasteful number, since it uses less digits than its factorization.

31242523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078 (or 1065 counting only the distinct ones).

The product of its digits is 1440, while the sum is 22.

The square root of 31242523 is about 5589.5011405312. The cubic root of 31242523 is about 314.9551393241.

Adding to 31242523 its reverse (32524213), we get a palindrome (63766736).

The spelling of 31242523 in words is "thirty-one million, two hundred forty-two thousand, five hundred twenty-three".